You stumble on down to the end of the hallway. It still smells terrible, but the air seems to be getting fresher- you must be nearing the exit. At the end of the hallway is a turn to the left, then a flight of stairs. At the end of the flight of stairs is a door, outlined with sharp white rays of light. You walk up the first step, but a pain shoots through your leg every time you step on it.
Eventually you get to the top of the stairs. You are standing in front of the door.
